The art of tattooing has always been at the forefront of cultural and social change, but today it is taking a decisive step towards medicine and high technology. In October 2025, at the prestigious international synthetic biology competition iGEM in Paris, a team of students from the Technical University of Munich (TUM) caused a sensation. Their innovative concept, named “InkSight,” is not just a drawing on the skin, but a fully functional medical tool: a tattoo-biosensor that visually displays important health parameters.
The project, which received a gold medal and ranked in the top ten overall, demonstrates that the era of functional body art has already arrived. Forget dragons and butterflies that serve only as decoration; these new tattoos are living indicators capable of saving lives or significantly simplifying family planning.
“InkSight”: How the Living Ink Indicator Works
The essence of the concept developed by the students, including biology bachelor Kalina Elkin from TUM, lies in using colored areas of the tattoo as a sensitive detector. “Our main goal is to use this colored area as a biosensor to detect the level of the sex hormone progesterone,” explains Elkin, a participant in the iGEM Munich initiative. The principle of operation is both simple and revolutionary:
- The tattoo contains living cells embedded in a special hydrogel.
- These cells are genetically engineered to produce nanostructures (nanocapsules) that produce skin pigment – melanin.
- On the outer cell wall, there is a receptor that “notices” when the progesterone concentration in the body exceeds a set threshold.
- When the threshold is exceeded, a signaling cascade is triggered, causing the nanocapsules to distribute evenly within the cell, and the tattoo visibly darkens.
Thus, hormonal status can be read literally “at a glance,” without the need for blood draws and complex laboratory analyses. According to Elkin, such a tattoo could be invaluable, for example, for tracking the female cycle for pregnancy planning purposes.
Context of Tattoo Culture: From Art to Biotechnology
For the tattoo artist community and fans of body art, the “InkSight” project is not just scientific news; it’s a tectonic shift. For decades, tattoos have been viewed either as a symbol of rebellion or as a pure art form. Now, they are becoming an element of personalized medicine and wearable technology. This development raises a crucial question: how will aesthetics combine with functionality?
Experts note that if “living biosensors” become a reality, tattoo artists may transform into a kind of “skin bio-engineers.” The requirements for sterility, precision of application (in this case, the injection of hydrogel with cells), and understanding of biological processes will increase manifold. This opens up a new niche: bio-tattoos, where the design will directly depend on the measured biomarker.
Success at iGEM 2025 and Future Plans
The International Genetically Engineered Machine (iGEM) competition is the largest student competition in synthetic biology, which, since its founding in Boston in 2004 (with only five teams participating then), has become a global platform. In the 2025 finals, held at the Paris Convention Centre, over 400 teams from around the world participated.
The iGEM Munich team, consisting of eight students from TUM and LMU (Ludwig Maximilian University of Munich), not only took gold but also received several special awards, including:
- Best Diagnostics Project
- Best Software
- Best Wiki
As Friedrich Irmer, a bachelor’s student in bioinformatics (TUM and LMU), notes, the project’s vision is much broader: in the future, they plan to create multi-colored tattoos capable of measuring multiple biomarkers simultaneously. “The concept of a ‘living biosensor’ combined with our software could be applied to other disease indicators in the future,” says Irmer. As an example, he mentions troponin, elevated levels of which can indicate heart problems.
However, the students maintain a realistic outlook. Irmer emphasizes that this is still an “early experimental stage,” and practical implementation is still a long way off.
The Role of Synthetic Biology and Mentorship
Professor Gil Westmeyer of TUM’s Neuroengineering group, who has been supervising the Munich iGEM teams since 2016, emphasizes the importance of the competition for students: “It’s an incredible experience that allows them to apply the knowledge gained in lecture halls and see their ideas come to life in the lab.”
Synthetic biology, also known as Engineering Biology, involves designing molecular building blocks (usually DNA or proteins) to perform specific functions. This approach has already brought success to the Munich teams: in 2016, the TUM team won the grand prize for a process of 3D printing living tissue to create artificial organs for transplantation.
The success of 2025 was the result of two semesters of intensive work, starting in November, including experimental planning, fundraising (with support from Anneliese Pfannenberg-Stiftung and Freunde der TUM e.V.), and outreach activities. In particular, in 2025, the team conducted a three-day intensive course for high school students from the Garching Gymnasium.
Further strengthening Munich’s position in this field is expected in the near future. Starting in 2026, the new Center of Excellence for Biological Systems Design (BioSysteM) will receive additional support, creating even more opportunities for future generations of students. Interest in the competition is also growing: in 2024, TUM Campus Straubing fielded a team for the first time and plans to participate again in 2026.
As student Aeneas Theus, also studying bioinformatics, summarizes, the time spent in the lab and at the computer was worth it: “We not only applied theory in practice but also learned a lot from each other, working together with students from completely different fields. It’s a fantastic experience aimed at finding solutions for a healthier and more sustainable world.”